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mxfdec: Make mxf->partitions sorted by offset 

This also zeroes new entries for good measure (used by future patches).
This commit is contained in:
Tomas Härdin 2011-12-08 11:06:23 +01:00
parent e5f9c8927b
commit 289bc14449
1 changed files with 15 additions and 1 deletions
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16
libavformat/mxfdec.c
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@ -192,6 +192,7 @@ typedef struct {
MXFPartition *current_partition;
int parsing_backward;
int64_t last_forward_tell;
int last_forward_partition;
} MXFContext;
enum MXFWrappingScheme {
@ -446,7 +447,20 @@ static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size
if (!mxf->partitions)
return AVERROR(ENOMEM);
partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count++];
if (mxf->parsing_backward) {
/* insert the new partition pack in the middle
* this makes the entries in mxf->partitions sorted by offset */
memmove(&mxf->partitions[mxf->last_forward_partition+1],
&mxf->partitions[mxf->last_forward_partition],
(mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
} else {
mxf->last_forward_partition++;
partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
}
memset(partition, 0, sizeof(*partition));
mxf->partitions_count++;
switch(uid[13]) {
case 2: